5. I’ve had the flu this season so I’m now immune
Multiple influenza strains circulate during flu season. Recovering from one particular strain doesn’t make you immune to other active strains. And if the virus that made you ill mutates, you could become sick again if you’re exposed to it. “Even if you think you’ve had the flu, still get the flu shot,” says Dr. Kerr. It’s also common for people to mistake a bad cold, or a bout of gastroenteritis for the flu, so skipping the shot on the heels of one of these illnesses isn’t recommended. It’s worth noting that the only way to confirm that you have influenza is to undergo a throat swab in a doctor’s office or emergency room. If the test comes back positive from the lab, you’ll have a definitive answer.